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学者姓名：柯心然
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Abstract ：
Current estimates of diel respiratory carbon release depend on accurate predictions of the temperature sensitivity (Q10) of leaf respiration during the day and night. Such predictions typically rely on measurements of the Q10 of respiration in the light (RL) and dark (RD) made during the day, and assuming that the Q10 of nocturnal respiration (RN) equals that of RD. Using RD as a surrogate for RN, however, creates errors in estimates of diel respiration whenever the Q10 of RD and RN differ. Using measurements made on field-grown, high-altitude alpine plants, our study investigated whether the Q10 of leaf respiration differs between the day and night. We characterised diurnal RL and RD from 15 to 35 degrees C, and RN from 10 to 25 degrees C at night, in four common herbaceous species widely distributed in alpine meadows on the Qinghai-Tibetan Plateau. We measured leaf temperature every second for 24 h over a period of 18 days. By combining leaf temperature with respiratory physiological measurements, we calculated leaf carbon loss to assess the consequences of differences in temperature response of leaf respiration between day and night. RN exhibited a higher Q10 than RL and RD by about one third. Although there were no significant differences in Q10 between RL and RD, light inhibition of leaf respiration (i.e. 100 % - RL / RD) was at its lowest at a moderate leaf temperature (22-25 degrees C). G. straminea and S. pulchra showed lower levels of inhibition than L. sagitta and L. virgaurea. Respiratory carbon loss (Closs_day) based on RN exceeded Closs_day based on RL by up to 47 %, which varied considerably between the species. These results suggest that the temperature sensitivity (Q10) of leaf respiration differs significantly between day and night, a finding that needs to be taken into account when modelling the diel rates of respiratory carbon loss in plants, especially at high altitudes and some high latitudes with a large diurnal variation and low mean temperature. Therefore, considering that neither RN nor RD can accurately represent RL, we strongly recommend that the observations of RL should be prioritized when estimating daytime leaf carbon loss.
Keyword ：
CO 2 fluxes CO 2 fluxes Forbs Forbs Leaf respiration Leaf respiration Light respiration Light respiration Qinghai-Tibet Plateau Qinghai-Tibet Plateau Temperature sensitivity Temperature sensitivity
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| GB/T 7714 | Zheng, Tianyu , Kang, Huixing , Yu, Yuan et al. Differential temperature responses of diurnal and nocturnal leaf respiration in four alpine herbaceous species [J]. | AGRICULTURAL AND FOREST METEOROLOGY , 2025 , 362 . |
| MLA | Zheng, Tianyu et al. "Differential temperature responses of diurnal and nocturnal leaf respiration in four alpine herbaceous species" . | AGRICULTURAL AND FOREST METEOROLOGY 362 (2025) . |
| APA | Zheng, Tianyu , Kang, Huixing , Yu, Yuan , Guo, Tong , Ke, Xinran , Atkin, Owen K. et al. Differential temperature responses of diurnal and nocturnal leaf respiration in four alpine herbaceous species . | AGRICULTURAL AND FOREST METEOROLOGY , 2025 , 362 . |
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It has long been held that tree species/leaves from shaded environments show faster rate of photosynthetic induction than species/leaves from sunlit environments, but the evidence so far is conflicting and the underlying mechanisms are still under debate. To address the debate, we compiled a dataset for 87 tree species and compared the initial increasing slope during the first 2-min induction (S-A) and stomatal and biochemical characteristics between sun and shade species from the same study, and those between sun and shade leaves within the same species. In 77% of between-species comparisons, the species with high steady-state photosynthetic rate in the high light (A(f)) exhibited a larger S-A than the species with low A(f). In 67% within-species comparisons, the sun leaves exhibited a larger S-A than the shade leaves. However, in only a few instances did the sun species/leaves more rapidly achieve 50% of full induction, with an even smaller S-A, than the shade species/leaves. At both the species and leaf level, S-A increased with increasing initial stomatal conductance before induction (g(si)). Despite exhibiting reduced intrinsic water-use efficiency in low light, a large S-A proportionally enhances photosynthetic carbon gain during the first 2-min induction in the sun species and leaves. Thus, in terms of the increase in absolute rate of photosynthesis, tree species/leaves from sunlit environments display faster photosynthetic induction responses than those from shaded environments. Our results call for re-consideration of contrasting photosynthetic strategies in photosynthetic adaption/acclimation to dynamic light environments across species.
Keyword ：
dynamic photosynthesis dynamic photosynthesis fluctuating light fluctuating light light acclimation light acclimation shade tolerance shade tolerance stomata stomata sunfleck sunfleck
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| GB/T 7714 | Kang, Huixing , Yu, Yuan , Ke, Xinran et al. Initial stomatal conductance increases photosynthetic induction of trees leaves more from sunlit than from shaded environments: a meta-analysis [J]. | TREE PHYSIOLOGY , 2024 , 44 (11) . |
| MLA | Kang, Huixing et al. "Initial stomatal conductance increases photosynthetic induction of trees leaves more from sunlit than from shaded environments: a meta-analysis" . | TREE PHYSIOLOGY 44 . 11 (2024) . |
| APA | Kang, Huixing , Yu, Yuan , Ke, Xinran , Tomimatsu, Hajime , Xiong, Dongliang , Santiago, Louis et al. Initial stomatal conductance increases photosynthetic induction of trees leaves more from sunlit than from shaded environments: a meta-analysis . | TREE PHYSIOLOGY , 2024 , 44 (11) . |
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Leaf spectral reflectance is a crucial indicator of leaf physiology both in eco-physiology and remote sensing. To assess how alpine plants acclimate or adapt to altitudinal environments, we examined leaf optical properties at wavelengths from 280 to 1100 nm in 797 leaves of 38 broad-leaved herbaceous species along an altitudinal gradient from 3200 m to 4400 m on the northeastern Qinghai-Tibetan Plateau. The mean leaf reflectance of all observed species increased with altitude at a rate of 6.3 %, 3.1 %, and 2.3 % km(-1 )in the ultraviolet (UV, 280-400 nm), photosynthetically active radiation (PAR, 400-700 nm), and near-infrared radiation (NIR, 700-1100 nm) regions, respectively. Increased leaf reflectance along the altitudes was found both within and among species. Within the UV region, a notable increase in spectral reflectance was observed at approximately 301 and 355 nm compared to other wavelengths. Within the PAR region, the peak wavelength of spectral reflectance shifted toward shorter wavelengths at a rate of 9.3 nm per km increase in altitude. The study suggests that alpine broadleaved species can precisely adjust leaf reflectance. Therefore, it is essential to interpret plant physiology carefully by exploiting leaf spectral reflectance in diverse environments and plant species.
Keyword ：
Altitudinal gradient Altitudinal gradient Broad-leaved herbaceous species Broad-leaved herbaceous species Leaf optical properties Leaf optical properties Leaf spectrum Leaf spectrum Qinghai-tibetan plateau Qinghai-tibetan plateau
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| GB/T 7714 | Ke, Xinran , Kang, Huixing , Guo, Tong et al. Altitudinal adjustment of leaf spectral reflectance in broad-leaved species on the Qinghai-Tibetan Plateau [J]. | AGRICULTURAL AND FOREST METEOROLOGY , 2024 , 358 . |
| MLA | Ke, Xinran et al. "Altitudinal adjustment of leaf spectral reflectance in broad-leaved species on the Qinghai-Tibetan Plateau" . | AGRICULTURAL AND FOREST METEOROLOGY 358 (2024) . |
| APA | Ke, Xinran , Kang, Huixing , Guo, Tong , Zhang, Yan , Zheng, Tianyu , Ma, Yixin et al. Altitudinal adjustment of leaf spectral reflectance in broad-leaved species on the Qinghai-Tibetan Plateau . | AGRICULTURAL AND FOREST METEOROLOGY , 2024 , 358 . |
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In China, Dolichandrone spathacea is a rare and endangered semi-mangrove plant species with an extremely small population, naturally distributed only in Zhanjiang City and the east coast of Hainan Island. Despite conservation concerns, the population status of D. spathacea has received little scientific attention. In this study, we evaluated the current status of D. spathacea on Hainan Island, China, in order to propose sustainable conservation strategies for future ecological restoration of its natural population. D. spathacea on Hainan Island can be divided into four populations. All the D. spathacea populations present a state of overall dispersion, local concentration, and occasionally sporadic existence, and they exist in geographical isolation. The young, middle, and old D. spathacea plants account for 20.42%, 66.20%, and 13.38%, respectively, indicating that the D. spathacea population on Hainan Island is declining. Furthermore, instead of temporal structure, we used diameter at breast height (DBH) to establish a static life table, draw a population survival curve, and quantify the future development trend through population dynamic analysis and time-series prediction. These results suggest that the D. spathacea population in the Bamen Gulf (Wenchang) and Qingmei Harbor (Sanya) on Hainan Island is sensitive to external disturbances and possesses two main increases in mortality rate-namely, in its juvenile and mature stages-due to competition and anthropogenic interferences, which might be the most important reasons for its endangered status. Depending on the current conditions of the D. spathacea population, we should conserve and expand mature trees in situ, preserve their germplasm resources, rehabilitate their habitats to promote provenance restoration, and conduct artificial cultivation and spreading planting in order to realize the sustainable conservation and management of D. spathacea.
Keyword ：
diameter at breast height diameter at breast height Dolichandrone spathacea Dolichandrone spathacea mangrove mangrove natural population natural population population dynamic characteristics population dynamic characteristics static life table static life table
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| GB/T 7714 | Tian, Mi , Ke, Xinran , Li, Ming et al. Population Status of the Endangered Semi-Mangrove Dolichandrone spathacea on Hainan Island, China [J]. | FORESTS , 2024 , 15 (5) . |
| MLA | Tian, Mi et al. "Population Status of the Endangered Semi-Mangrove Dolichandrone spathacea on Hainan Island, China" . | FORESTS 15 . 5 (2024) . |
| APA | Tian, Mi , Ke, Xinran , Li, Ming , Deng, Kaixuan , Yang, Yong , Fang, Zanshan et al. Population Status of the Endangered Semi-Mangrove Dolichandrone spathacea on Hainan Island, China . | FORESTS , 2024 , 15 (5) . |
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Albizia odoratissima Benth is a perennial evergreen tree valued for its medicinal properties and is indigenous to the mountainous regions of southwestern China. The population status of A. odoratissima has been sparsely studied. This study systematically evaluated the population structure and dynamics of A. odoratissima in the central mountainous region of Hainan Island, China, with the objective of informing the development of sustainable conservation strategies for the ecological restoration of its natural populations. Using the methodologies of population ecology, including the development of static life tables, population survival curves, population dynamics analysis, and time-series predictions, the results indicated that the populations of A. odoratissima on Hainan Island were geographically isolated into three groups. The age class distribution revealed that young, middle-aged, and mature individuals accounted for 5.73%, 74.94%, and 19.33%, respectively, suggesting a declining trend in the population. Moreover, the A. odoratissima population on Hainan Island was highly sensitive to anthropogenic disturbances, with significant increases in mortality rates observed at both the juvenile and mature stages. These results were likely due to the intraspecific and interspecific competitions, as well as external factors including human-induced disturbances, climate variability, and extreme weather events, which might potentially lead to the species' future endangerment. Based on the current status of the A. odoratissima population, we develop adaptive management and forbid anthropogenic deforestation, conserving in situ and expanding populations, protecting ex situ germplasm resources, and replanting artificially, in order to manage the long-term conservation and management of A. odoratissima.
Keyword ：
anthropogenic disturbance anthropogenic disturbance diameter at breast height diameter at breast height population ecology population ecology static life table static life table time-series predictions time-series predictions
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| GB/T 7714 | Yang, Yong , Ke, Xinran , Ji, Qiaomiao et al. Conservation Implications of Population Structure and Dynamics in Medicinal Arbor Albizia odoratissima on Hainan Island, China [J]. | FORESTS , 2024 , 15 (12) . |
| MLA | Yang, Yong et al. "Conservation Implications of Population Structure and Dynamics in Medicinal Arbor Albizia odoratissima on Hainan Island, China" . | FORESTS 15 . 12 (2024) . |
| APA | Yang, Yong , Ke, Xinran , Ji, Qiaomiao , Lang, Tao , Lai, Zongrui , Guan, Yali . Conservation Implications of Population Structure and Dynamics in Medicinal Arbor Albizia odoratissima on Hainan Island, China . | FORESTS , 2024 , 15 (12) . |
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Tannins play vital roles in regulating ecological processes in mangrove forests. However, how tannins affect nitrogen (N) cycling and microbial metabolism in mangrove ecosystems remains largely unexplored. In this study, we hypothesized the types and amounts of tannins released into seawater and sediments during leaf litter decomposition differed among mangrove plant species, thus their effects on N and microbial metabolism also varied. The alterations of tannins, and environmental N and microbial metabolism during leaf litter decomposition of Kandelia obovata, Avicennia marina, and Sonneratia apetala were evaluated by a microcosm-simulated tidal system. Results showed that total polyphenols (TPs) in seawater treated with K. obovata litter were significantly higher than those in A. marina and S. apetala treatments, although the trends of TP changes elicited an initial increase followed by a decrease during decomposition. The dynamic changes in TPs reduced the seawater N concentrations in K. obovata treatment but not in A. marina and S. apetala treatments. The results of microbial metabolism analysis revealed that leaf litter significantly increased microbial metabolic activities and diversities. The types of carbon sources utilized by sediment microorganisms differed among treatments, with the microbes in S. apetala and A. marina litter used more varieties of amino acids, lipids and sugars than those in K. obovata treatment, probably due to the rich amount of hydrolysable tannins (HTs) in the first two species while the last species only contained ondensed tannins (CTs). CTs released from K. obovata leaf litter not only bound nitrogen-containing macromolecular compounds such as amino acids and proteins but also carbohydrates like polysaccharides, which decreased the supply of C and N to sediment microbiota. These results reveal that the release of mangrove tannins during leaf litter decomposition is one of the key factors driving N cycling, and microbial activities and diversities in mangrove wetlands.
Keyword ：
Hydrolysable and condensed tannins Hydrolysable and condensed tannins Leaf litter Leaf litter Mangrove Mangrove Microorganisms Microorganisms Nitrogen Nitrogen Sediment Sediment
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| GB/T 7714 | Lang, Tao , Ke, Xinran , Wei, Jian et al. Dynamics of tannin variations in mangrove leaf litter decomposition and their effects on environmental nitrogen and microbial activity [J]. | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 908 . |
| MLA | Lang, Tao et al. "Dynamics of tannin variations in mangrove leaf litter decomposition and their effects on environmental nitrogen and microbial activity" . | SCIENCE OF THE TOTAL ENVIRONMENT 908 (2023) . |
| APA | Lang, Tao , Ke, Xinran , Wei, Jian , Hussain, Muzammil , Li, Mingdang , Gao, Changjun et al. Dynamics of tannin variations in mangrove leaf litter decomposition and their effects on environmental nitrogen and microbial activity . | SCIENCE OF THE TOTAL ENVIRONMENT , 2023 , 908 . |
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Laguncularia racemosa is widely planted in coastal mudflats as a pioneer species of mangrove afforestation in China; however, whether it exhibits invasiveness as an exotic species has been a topic of debate. In this study, we investigated the distribution, community structure, and population characteristics of L. racemosa on Hainan Island, China, to discuss its potential invasiveness. The results showed that Hainan Island has become an important distribution area for L. racemosa in China, covering a total area of 64.90 ha. In this investigation, a total of 11 true mangrove species, belonging to six families and 11 genera, were discovered in the L. racemosa community throughout Hainan Island. Furthermore, L. racemosa exhibited a strong adaptive range to seawater salinity and demonstrated a high capacity for natural dispersion. L. racemosa exhibited high importance values in the tree, shrub, and seedling layers of this artificial community, indicating its dominance and potential exclusion of other mangrove species. Over time, the importance values of L. racemosa in the tree and shrub layers initially decreased and then increased, while the opposite trend was observed in the seedling layer. Overall, the diversity indexes, including the Simpson index, Shannon-Wiener index, and Pielou community evenness index, were low in the planted L. racemosa forest on Hainan Island, suggesting a relatively simple species composition within the L. racemosa community. Additionally, based on the height levels of the L. racemosa population, we found that it mainly belonged to the first level, characterized by a large number of seedlings on Hainan Island. The number of L. racemosa seedlings gradually decreased in subsequent levels, and higher height levels of L. racemosa appeared with longer planting times, indicating a growing trend of potential invasiveness of L. racemosa on Hainan Island over an extended period. We suggest that the government should be able to list L. racemosa as an invasive species that can be harvested in the future. Based on this, this study provides fundamental data and theoretical references for the sustainable prevention, control, and management of the exotic species L. racemosa on Hainan Island, and also in other mangrove wetlands in China.
Keyword ：
biodiversity biodiversity invasive species invasive species mangrove forest mangrove forest natural dispersion natural dispersion
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| GB/T 7714 | Cheng, Cheng , Ke, Xinran , Lang, Tao et al. Current Status and Potential Invasiveness Evaluation of an Exotic Mangrove Species, Laguncularia racemosa (L.) CF Gaertn, on Hainan Island, China [J]. | FORESTS , 2023 , 14 (10) . |
| MLA | Cheng, Cheng et al. "Current Status and Potential Invasiveness Evaluation of an Exotic Mangrove Species, Laguncularia racemosa (L.) CF Gaertn, on Hainan Island, China" . | FORESTS 14 . 10 (2023) . |
| APA | Cheng, Cheng , Ke, Xinran , Lang, Tao , Zhong, Cairong , Lv, Xiaobo , Zhang, Mengwen et al. Current Status and Potential Invasiveness Evaluation of an Exotic Mangrove Species, Laguncularia racemosa (L.) CF Gaertn, on Hainan Island, China . | FORESTS , 2023 , 14 (10) . |
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